God is in the "present". "Now" is when we hear his voice. Now is when we should pay attention. Now is when He guides us. "Pray without ceasing" (1 Thess. 5:17) makes more sense when we understand we should not trust in what we understood in the past concerning His guidance today.
Prov. 3:5-6 also makes more sense. "5. Trust in the Lord with all your heart, and do not lean on your own understanding. 6. In all your ways acknowledge him, and he will make straight your paths."